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build: fix freetype C enum signedness for MSVC

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MSVC translates C enums as signed int, while GCC/Clang uses unsigned
int. The freetype Zig bindings hardcode c_uint for enum backing types,
causing type mismatches when compiling with MSVC target.

Fix by adding @intCast at call sites where enum values are passed to
C functions, and @bitCast for the glyph format tag extraction where
bit-shift operations require unsigned integers.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
Alessandro De Blasis
2026-03-24 17:12:18 +01:00
parent deeda46186
commit ce99300513
2 changed files with 9 additions and 6 deletions
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11
src/font/face/freetype.zig
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@@ -679,13 +679,16 @@ pub const Face = struct {
else => |f| {
// Glyph formats are tags, so we can
// output a semi-readable error here.
// Use @bitCast to u32 because MSVC translates C enums
// as signed int, while GCC/Clang uses unsigned int.
const tag: u32 = @bitCast(f);
log.err(
"Can't render glyph with unsupported glyph format \"{s}\"",
.{[4]u8{
@truncate(f >> 24),
@truncate(f >> 16),
@truncate(f >> 8),
@truncate(f >> 0),
@truncate(tag >> 24),
@truncate(tag >> 16),
@truncate(tag >> 8),
@truncate(tag >> 0),
}},
);
return error.UnsupportedGlyphFormat;